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Section 5 Menu Functions and Procedures
Rev A Apr 2019
IDU-450 EFIS Software Version 8.0H (Rotorcraft)
5-3
5.2. Menu
Synchronization
System settings changed by the menu system are synchronized between
multiple IDUs in MFD-MFD mode. All parameters for rotorcraft are included.
Each appendix for Datalink, Strikes, RBP, and Traffic contains specific
limitations for menu synchronization for that feature.
Table 5-2: Menu Synchronization
Menu Parameter
Notes
The following menu parameters are synchronized across all displays at
all times. These are bugs and fundamental aircraft values that should
never have independence.
AHRS 1 and 2 mode and slewing
values
Fuel Totalizer Quantity
VNAV Climb Angle
Countdown Timer Start Time
Countdown Timer Default Value
Remote Tune Frequencies
VNAV Descent Angle
Decision Height Setting
Used when “Dual Decision
Height Flag” as set in EFIS limits.
Emergency and Minimum Fuel
Settings
Heading Bug and Heading Sub-
Mode
High Weight
V
NE
selection
Minimum Altitude Bug Value
VLOC OBS Settings
Airspeed Bug Setting
Target Altitude Bug Setting
Timer Starting Signal
True North Mode
UTC Offset
VSI Bug Setting
Crosslink Synchronization Status
The following menu parameters are synchronized across all displays
when crosslink is enabled. Otherwise, they are only synchronized
onside. These parameters are FMS parameters and allow the pilot and
co-pilot FMSs to be operated independently when crosslink is inhibited.
Active Flight Plan Parameters
Runway Display Parameters
The following menu parameters are only synchronized onside. These
parameters are usually sensor selections or PFD options used to keep